by American Asociation of State Highway and Transportation Officials $9.00
by Pradipta $11.00
by WK $13.00
by WK $12.00
by Ir. M. Iqbal Hasan $9.00
by Eaton, Joseph W $6.00
by Sukardja, Ahmad $6.00
by Soedharyo Soimin, S.H. $9.00
by R. Wiyono, S. H. $12.00
by Parwadi Moengin $11.00